From 2ed3d738b2668b64d3ea6a76a8a8b1eff0a091de Mon Sep 17 00:00:00 2001
From: Rajas Paranjpe <52586855+ChocolateLoverRaj@users.noreply.github.com>
Date: Sat, 2 Aug 2025 12:02:59 -0700
Subject: [PATCH] Add structs for TCPA and TPM2 tables

Not complete
---
 acpi/src/lib.rs  |  2 ++
 acpi/src/tcpa.rs | 21 +++++++++++++++
 acpi/src/tpm2.rs | 69 ++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 92 insertions(+)
 create mode 100644 acpi/src/tcpa.rs
 create mode 100644 acpi/src/tpm2.rs

diff --git a/acpi/src/lib.rs b/acpi/src/lib.rs
index 0b254df1..f6673678 100644
--- a/acpi/src/lib.rs
+++ b/acpi/src/lib.rs
@@ -73,6 +73,8 @@ pub mod mcfg;
 pub mod rsdp;
 pub mod sdt;
 pub mod spcr;
+pub mod tcpa;
+pub mod tpm2;
 
 #[cfg(feature = "allocator_api")]
 mod managed_slice;
diff --git a/acpi/src/tcpa.rs b/acpi/src/tcpa.rs
new file mode 100644
index 00000000..41266046
--- /dev/null
+++ b/acpi/src/tcpa.rs
@@ -0,0 +1,21 @@
+use crate::{
+    sdt::{SdtHeader, Signature},
+    AcpiTable,
+};
+
+#[repr(C, packed)]
+#[derive(Debug)]
+pub struct Tcpa {
+    pub header: SdtHeader,
+    platform_class: u16,
+    pub log_area_minimum_len: u32,
+    pub log_area_start_addr: u64,
+}
+
+unsafe impl AcpiTable for Tcpa {
+    const SIGNATURE: Signature = Signature::TCPA;
+
+    fn header(&self) -> &crate::sdt::SdtHeader {
+        &self.header
+    }
+}
diff --git a/acpi/src/tpm2.rs b/acpi/src/tpm2.rs
new file mode 100644
index 00000000..bda9ea74
--- /dev/null
+++ b/acpi/src/tpm2.rs
@@ -0,0 +1,69 @@
+use crate::{
+    sdt::{SdtHeader, Signature},
+    AcpiTable,
+};
+
+#[repr(C, packed)]
+#[derive(Debug)]
+pub struct Tpm2 {
+    pub header: SdtHeader,
+    platform_class: u16,
+    _reserved: [u8; 2],
+    addr_of_crb_control_area_or_fifo_base_addr: u64,
+    start_method: u32,
+    start_method_parameters: [u8; 16],
+    log_area_minimum_len: u32,
+    log_area_start_addr: u64,
+}
+
+unsafe impl AcpiTable for Tpm2 {
+    const SIGNATURE: Signature = Signature::TPM2;
+
+    fn header(&self) -> &crate::sdt::SdtHeader {
+        &self.header
+    }
+}
+
+impl Tpm2 {
+    pub fn platform_class(&self) -> Option<PlatformClass> {
+        match self.platform_class {
+            0 => Some(PlatformClass::Client),
+            1 => Some(PlatformClass::Server),
+            _ => None,
+        }
+    }
+
+    pub fn start_method(&self) -> Option<StartMethod> {
+        match self.start_method {
+            2 => Some(StartMethod::AcpiStartMethod),
+            6 => Some(StartMethod::Mmio),
+            7 => Some(StartMethod::CommandResponseBufferInterface),
+            8 => Some(StartMethod::CommandResponseBufferInterfaceWithAcpiStartMethod),
+            11 => Some(StartMethod::CommandResponseBufferWithArmSecureMonitorOrHypervisorCall),
+            12 => Some(StartMethod::FifoOverI2c),
+            13 => Some(StartMethod::CommandResponseBufferInterfaceWithAmdMailboxSpecificNotification),
+            15 => Some(StartMethod::CommandResponseBufferInterfaceWithAmdFirmwareFrameworkA),
+            _ => None,
+        }
+    }
+}
+
+#[derive(Debug)]
+#[repr(u16)]
+pub enum PlatformClass {
+    Client,
+    Server,
+}
+
+#[derive(Debug)]
+#[repr(u32)]
+pub enum StartMethod {
+    AcpiStartMethod = 2,
+    Mmio = 6,
+    CommandResponseBufferInterface = 7,
+    CommandResponseBufferInterfaceWithAcpiStartMethod = 8,
+    CommandResponseBufferWithArmSecureMonitorOrHypervisorCall = 11,
+    FifoOverI2c = 12,
+    CommandResponseBufferInterfaceWithAmdMailboxSpecificNotification = 13,
+    CommandResponseBufferInterfaceWithAmdFirmwareFrameworkA = 15,
+}